Reproductive Methods as Factors in Speciation in Flowering Plants
This extract was created in the absence of an abstract.
Excerpt
The study of pollination systems and other aspects of the biology of reproduction in flowering plants was pursued vigorously in the last half of the nineteenth century but went into a decline at the beginning of the twentieth. With the development of population genetics, however, has come a realization that the methods by which the plants in a species reproduce have a very important effect upon the genetical structure of the populations which they form. In turn, the structure of the populations has an equally important bearing on the future evolution of the species, as well as the production of new species from it.
Criteria For The Recognition Of Species
In any discussion of species and their origins, it is vital that a clear statement be made of what is assumed under the name “species”. Actually, despite the existence of a very wide variety of opinions as to how much...
